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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Mendoza's method for clearing lunars.
From: Frank Reed CT
Date: 2004 Aug 7, 14:05 EDT
From: Frank Reed CT
Date: 2004 Aug 7, 14:05 EDT
George H wrote:
"Included are all the five methods of Norie (Krafft, Borda,Witchell. Mendoza, Lyon), with an
example of each, together with table XXXV. "
For anyone else interested in the methods in Norie, the edition available online is very nearly identical:
http://www.mysticseaport.org/library/initiative/MsList.cfm
It's from twenty years earlier (during the heyday of lunars). The only change in the lunars methods from 1828 to 1848 was the replacement of Dunthorne's method by Krafft's (a method of natural versed sines) which became popular later than it should have.
A far back as 1796, Mendoza Rios himself expressed his fondness for a method in natural versines and lamented the fact that tables of versed sines were not widely available. As late as 1908, Dunraven recommends only one method for clearing lunars, a method in natural versines of which, compared to other clearing methods, he says "appears to me the simplest of them all, and the easiest to remember". He cautions that it is not "advocated generally", but I think that's just his style.
Frank R
[ ] Mystic, Connecticut
[X] Chicago, Illinois
"Included are all the five methods of Norie (Krafft, Borda,Witchell. Mendoza, Lyon), with an
example of each, together with table XXXV. "
For anyone else interested in the methods in Norie, the edition available online is very nearly identical:
http://www.mysticseaport.org/library/initiative/MsList.cfm
It's from twenty years earlier (during the heyday of lunars). The only change in the lunars methods from 1828 to 1848 was the replacement of Dunthorne's method by Krafft's (a method of natural versed sines) which became popular later than it should have.
A far back as 1796, Mendoza Rios himself expressed his fondness for a method in natural versines and lamented the fact that tables of versed sines were not widely available. As late as 1908, Dunraven recommends only one method for clearing lunars, a method in natural versines of which, compared to other clearing methods, he says "appears to me the simplest of them all, and the easiest to remember". He cautions that it is not "advocated generally", but I think that's just his style.
Frank R
[ ] Mystic, Connecticut
[X] Chicago, Illinois
